"Autopatcher can download updates once and apply them to multiple computers offline
In short, AutoPatcher combines the advantage of both Windows Update (presentation and description of updates and automated installation), and the special administrative updates (portability and installation without the need of an Internet connection)."
Sometimes if you're lucky, you can find a specific update through MSDN or Technet, and just download a file. It was nice in the old days when they had a specific download page.
"If you contact Microsoft and explain the situation they may be willing to send you a disk with the latest service pack on it. They did this for me with Windows XP SP2 when I was in a place where I could not get an Internet connection. Of course, this probably won't work well on a regular basis but if you're in a standalone environment patches protecting you from Internet-based threats probably aren't high priority.
Alternatively, you can follow Kyle Bedell's advice. This is how we run updates where I work and I can attest that this works very well."
